The universe of technical indicators is huge and even after more than 5 years of trading I haven't found that one indicator that always works and gives the best possible trading signals. I do like to a look a wider range of indicators and will filter some out when there are conflicting signals. The problem with trading data is that there is a lot of noise in the market. Especially when looking at the small intervals like 1 to 5 minute price data, we will find a lot of short term trends that are not real. Which is why I like to look at moving averages based on 10,30,60 and 90 days. This has been probably my single most useful trading indicator. Because it gives different trends based on the time frame and I can quickly identify if the market is changing long term. From time to time it can also help to look at shorter data and use intra day trading signals. But I would always recommend to double check any signal and not to trade on one indicator alone. There is a reason for having all these different technical analysis books recommending a different signals. As long as it's for free and we can verify the data, I would it include it in your initial analysis. In general I would recommend to have a mix of short term, medium term and long term indicators that all work together.